Percent Error and Simple Interest

Jonah earned $150.36 in interest on an account that earns 1.4% simple interest. If Jonah opened the account 12 years ago, what was the principal amount?

Scott took out a 72 month loan for $35,000 to purchase a new boat. If Scott paid $8,925 in simple interest, what was the interest rate?

The veterinarian weighed Oliver’s new puppy, Boaz, on a broken scale. He weighed 36 pounds. However, Boaz actually weighs 34.5 pounds. What is the percent error?

Emilio borrows $1200 from a bank with 8% simple interest per year.  How much will he have to pay back total in 2 years?

You estimate that 200 people attend a school concert. The actual attendance was 240.   What is the percent error?

You guessed that the Chicago Cubs would win 95 games during the regular season. They actually won 103. What was your percent error? Round to the nearest tenth if necessary.

You guess that Lebron James would score 35 points during the game. He actually scored 28. Find your percent error.

The simple interest formula is I=Prt.  The P represents the principle.  The principle is ___________________.  

Find the percent error:

Estimated Value: 43

Actual Value: 50

DO NOT TYPE THE PERCENT SIGN

(a)  

Find the percent errors for Trial A and Trial B.